I have been using Eagle 7.5 (professional license) for quite a while now and have not noticed any CAM processor errors (using .CAM and .DRU files from iteadstudio).You can see boards herehttp://www.crossroadsfencing.com/BobuinoRev17/Example

I'm reluctant to upgrade when V6 does all I need. How have you find it? Are the extra features of any use? Also where do you assemble your boards?

I had issues with V6 crashing on me and losing work on complex designs with lots of parts and many many traces (I complained and found out there are regular backups made so that you can recover without having to re-do too much, rename the .s#1 and .b#1 for example to .sch and .brd to recover).

MrsCrossRoads and I do most of our own assembly. If we have a large run of boards for a commercial customer, we farm that out, that gets tedious to assemble. Or large boards with tons of parts, gets hard to place a really large number of small SMD parts without screwing something up. Or boards with fine pitch parts and 0402, 0603 size components.Boards with thru hole and 0805 parts are not bad. I try to keep designs under 10cm x 10cm to keep board costs down.

Check them out. Not ONLY cheap price for as low quantity for 5 pcs, they have more discounts for mass production !!! The PCBs are high quality as well especially I like the silkscreen from them. They help you to turn your idea into product by going through a complete solution for you from PCB prototyping to PCB Assembly, Testing and so on !

I used PCBshopper to select the cheap PCB manufacturers and EasyEDA seems to be a good choice. I've used it a couple of times and have been impressed by the quality of their PCBs.

There is a pricing calculator at https://easyeda.com/order. The cheapest option is for 10pcs of 50mmx50mm boards, which comes to 9.8USD. 10pcs of 100mmx100mm boards is 17.6USD. For larger boards, 5pcs is cheaper than 10pcs. Definitely worthwhile messing around with the pricing calculator.

EasyEDA offers a free, web-based tools to do the schematic capture, any simulation required and the PCB layout and then generate the Gerbers (which are free to download and can be used with any PCB fab house: there's no tie to EasyEDA). From within EasyEDA, the Gerbers can be submitted straight to EasyEDA for fab.

You should read earlier posts to this thread. There are several good places to buy. I use Itead studio10cm*10cm is 19$ plus postage. Often the postage cost is higher than the PCB cost. I have also ordered larger and they were good with reasonable cost.https://www.itead.cc/open-pcb/pcb-prototyping/2layer-green-pcb-10cm-x-10cm-max.html

I've used http://www.pcbway.com a lot of times for my pcbs. The quality is satisfying and they ship to Europe. The shipment usually takes 15-25 days. The shipping costs go up depending on the weight of your pcbs so try to keep it light if possible.

here are some photos:https://i.imgur.com/vmYSqZu.jpghttps://i.imgur.com/SmONhHi.jpghttps://i.imgur.com/jaCDBEB.jpg

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One debugging step I have learned the hard way is to view only layer 19 the unrouted layer. In a complex board you may not be able to see short unrouted air traces, by only showing the unrouted layer you of course can see them clearly if they are there.